Deferred execution in C#

Question

How could I implement my own deferred execution mechanism in C#?

So for instance I have:

string x = DoFoo();

Is it possible to perf

Answer 1

While it's somewhat dirty you could always use the yield keyword:

public IEnumerable DoFoo() {
   Console.WriteLine("doing foo");
   yield return 10;
}

[Test]
public void TestMethod()
{
    var x = DoFoo();
    Console.WriteLine("foo aquired?");
    Console.WriteLine(x.First());
}